James Price a5d73ce965 transform/shader_io: Generate a wrapper function
This is a major reworking of this transform. The old transform code
was getting unwieldy, with part of the complication coming from the
handling of multiple return statements. By generating a wrapper
function instead, we can avoid a lot of this complexity.

The original entry point function is stripped of all shader IO
attributes (as well as `stage` and `workgroup_size`), but the body is
left unmodified. A new entry point wrapper function is introduced
which calls the original function, packing/unpacking the shader inputs
as necessary, and propagates the result to the corresponding shader
outputs.

The new code has been refactored to use a state object with the
different parts of the transform split into separate functions, which
makes it much more manageable.

Fixed: tint:1076
Bug: tint:920
Change-Id: I3490a0ea7a3509a4e198ce730e476516649d8d96
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60521
Auto-Submit: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
2021-08-04 22:15:28 +00:00

106 lines
2.2 KiB
HLSL

struct S {
int a;
int b;
int c;
};
cbuffer cbuffer_x_10 : register(b0, space0) {
uint4 x_10[1];
};
static float4 x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
void main_1() {
int x_43 = 0;
bool x_44 = false;
S arr[2] = (S[2])0;
S param = (S)0;
int param_1 = 0;
while (true) {
int x_50 = 0;
x_50 = asint(x_10[0].x);
arr[x_50].a = 2;
const int x_53 = arr[1].a;
if ((x_53 < 1)) {
x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
x_44 = true;
break;
} else {
const S x_60 = arr[1];
param = x_60;
param_1 = (2 + asint(x_50));
const int x_61 = param_1;
S x_64_1 = param;
x_64_1.a = x_61;
param = x_64_1;
if ((param.a == 2)) {
S x_71_1 = param;
x_71_1.a = 9;
param = x_71_1;
}
const int x_72 = param_1;
S x_76_1 = param;
x_76_1.b = (x_72 + 1);
param = x_76_1;
const int x_77 = param_1;
S x_81_1 = param;
x_81_1.c = (x_77 + 2);
param = x_81_1;
if ((param.b == 2)) {
S x_88_1 = param;
x_88_1.b = 7;
param = x_88_1;
}
x_43 = ((param.a + param.b) + param.c);
if ((x_43 == 12)) {
x_GLF_color = float4(1.0f, 0.0f, 0.0f, 1.0f);
} else {
x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
}
}
x_44 = true;
break;
}
return;
}
struct main_out {
float4 x_GLF_color_1;
};
struct tint_symbol {
float4 x_GLF_color_1 : SV_Target0;
};
main_out main_inner() {
main_1();
const main_out tint_symbol_2 = {x_GLF_color};
return tint_symbol_2;
}
tint_symbol main() {
const main_out inner_result = main_inner();
tint_symbol wrapper_result = (tint_symbol)0;
wrapper_result.x_GLF_color_1 = inner_result.x_GLF_color_1;
return wrapper_result;
}
int func_struct_S_i1_i1_i11_i1_(inout S s, inout int x) {
const int x_103 = x;
s.a = x_103;
const int x_105 = s.a;
if ((x_105 == 2)) {
s.a = 9;
}
const int x_109 = x;
s.b = (x_109 + 1);
const int x_112 = x;
s.c = (x_112 + 2);
const int x_115 = s.b;
if ((x_115 == 2)) {
s.b = 7;
}
const int x_119 = s.a;
const int x_120 = s.b;
const int x_122 = s.c;
return ((x_119 + x_120) + x_122);
}